21030003001200 has 60 divisors (see below), whose sum is σ = 67366109617688. Its totient is φ = 5608000800000.

The previous prime is 21030003001193. The next prime is 21030003001213. The reversal of 21030003001200 is 210030003012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×21030003001200² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8762500051 + ... + 8762502450.

Almost surely, 2^{21030003001200} is an apocalyptic number.

21030003001200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21030003001200 is an abundant number, since it is smaller than the sum of its proper divisors (46336106616488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21030003001200 is a wasteful number, since it uses less digits than its factorization.

21030003001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17525002522 (or 17525002511 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 21030003001200 its reverse (210030003012), we get a palindrome (21240033004212).

The spelling of 21030003001200 in words is "twenty-one trillion, thirty billion, three million, one thousand, two hundred".